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C++ Institute Exam CPP Topic 4 Question 79 Discussion

Actual exam question for C++ Institute's CPP exam
Question #: 79
Topic #: 4
[All CPP Questions]

What will happen when you attempt to compile and run the code below, assuming that file test.out do not exist before the program execution?

#include

#include

#include

#include

#include

using namespace std;

templatestruct Out {

ostream & out;

Out(ostream & o): out(o){}

void operator() (const T & val ) {out<

int main (){

int t[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};

fstream f("test.out");

list l(t, t+10);

for_each(l.begin(), l.end(), Out(f));

f.close();

return 0;

}

Show Suggested Answer Hide Answer
Suggested Answer: C

by Franklyn at Mar 08, 2024, 03:58 PM

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Ronna
1 months ago
I bet the answer is C. The code is using a template, which means it's probably trying to be way too clever for its own good. I bet the compiler just throws up its hands and refuses to compile it.
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Bernardo
13 days ago
User 3
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Harley
22 days ago
User 2
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Nettie
29 days ago
User 1
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Sunny
1 months ago
Hmm, I'm not sure. Maybe it's option C? After all, the code doesn't explicitly check if the file exists before trying to open it. It could just fail silently. But then again, that would be a pretty lame way to handle file I/O. I'll go with option D, just to be safe.
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Celestina
4 days ago
Hmm, I see your point. Option D does make sense as well.
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Ernest
14 days ago
I'm not so sure, I think it might be option D. The file will contain the sequence 1 2 3 4 5 6 7 8 9 10.
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Carmelina
17 days ago
I agree, option A seems like the most logical choice.
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Dylan
28 days ago
I think it's option A. The file will be created and opened for writing.
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Erinn
2 months ago
I'm pretty sure it's option E. There has to be a compilation error somewhere in that code. I mean, who writes code like that these days? It's like they're trying to make it as complicated as possible.
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Lavonda
3 days ago
User 3: I agree, the code seems unnecessarily complicated. Option E sounds like the most likely outcome.
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Jestine
9 days ago
User 2: Yeah, it does look quite complex. Maybe that's why there's a compilation error.
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Leota
16 days ago
User 1: I think it's option E. There must be a compilation error in that code.
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Arminda
2 months ago
Definitely option D. The code will create the file `test.out` and write the sequence `1 2 3 4 5 6 7 8 9 10` to it.
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Anthony
2 months ago
The file `test.out` will be created and opened for writing. This is because the `fstream` object `f` is used to open the file, and the `for_each` loop will write the contents of the `list` to the file.
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Benedict
13 days ago
D) file test.out will contain sequence 1 2 3 4 5 6 7 8 9 10
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Kallie
22 days ago
The program will create and open the file test.out for writing.
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Kelvin
26 days ago
A) file test.out will be created and opened for writing
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Cristy
3 months ago
I'm not sure, but I think there might be a compilation error.
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Izetta
3 months ago
I believe the file test.out will contain the sequence 1 2 3 4 5 6 7 8 9 10.
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Casie
3 months ago
I think the file test.out will be created and opened for writing.
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